In today's blog post, this summer's Windows Phone 8 OS update is described as including "a small number of improvements and upgrades." The post said it will be similar in size to the last update, a k a Portico, which included Wi-Fi and messaging improvements, among other new features.

The update will reintroduce support for FM radio (as a feature carriers can opt to support or not) -- a feature which was part of the Windows Phone 7 operating system platform, but which was cut for Windows Phone 8. The update also will make the Data Sense monitoring feature of Windows Phone 8 available for more carriers to support if they decide to do so.

The coming update also will improve the ability to select, download and pin tunes in Xbox Music and improve the accuracy of song information and "other metadata."

"The update includes hundreds of other small quality improvements," according to Microsoft's blog post. There may be some other major features not yet disclosed by Microsoft officials coming, as well, but right now that's all the Softies are saying.

The GDR2 update will be rolling out to existing Windows Phone 8 users starting "later this summer," officials said today.